Control for loom transfer mechanism



A. CEDERLUND CONTROL FOR LOOM TRANSFER MECHANISM March 11, 1941.

Filed Oct. 30, 1959 Invergtov d Awevt (Le eflun w t Att ovney Patented Mar. 11, 1941 V UNITED STATES PATENT OFFICE CONTROL FOR LOOM TRANSFER, NIECHANISM Application October 30, 1939, Serial No. 301,925

5 Claims.

This invention relates to improvements in controllers for loom transfer mechanisms more particularly those used with rocking magazines and it is the general object of the invention to prevent transfer if the magazine is not properly placed to locate a reserve bobbin in the path of the transferrer arm.

In certain types of multicolor weft replenishing looms the reserve bobbins are held by a magazine which rocks to predetermined positions to place one or another of different reserve Wefts in transfer position. The magazine is usually provided with a transfer arm which descends on a transferring beat of the loom to insert a reserve bobbin thereunder into a shuttle. If the magazine fails to reach proper transfer position and stops at an intermediate point the reserve bobbin intended for transfer will not be located for proper engagement with the transfer arm and breakage is likely to result. It is an important object of my present invention to provide a control means for the transferrer arm actuator which prevents the latter from moving the transfer arm if the magazine has not moved fully to one or another of the positions from which a normal transfer can occur.

The usual transfer mechanism includes a latch which is raised from a normal to a transferring position to be in the path of a lay carried bunter on transferring beats of the loom. In the particular embodiment of my invention illustrated hereinafter I prevent transfer by means of a latch controller positioned out of restraining position with respect to the latch when the magazine is properly placed but moved by the magazine to an intermediate position to prevent the latch from moving to transfer position when the magazine stops at some position between its normal transfer positions.

When the weft detector calls for a transferring operation the latch is moved toward transfer position by a lifter and it is a further object of my present invention to provide a yielding connection between the lifter and the latch which will prevent breakage when the latch is prevented from having its normal movements toward transfor position.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. l is an end elevation of a weft replenishing loom having my invention applied thereto, the

lay and shuttle being shown in section and the magazine being shown in two different positions each of which is proper for a transfer,

Fig. 2 is a view similar to Fig. 1 but showing the magazine in an intermediate position and not properly placed for transfer, and

Fig, 3 is a vertical section on line 3-4 of Fig. 1.

Referring to the drawing, the loom frame H) has a bracket H supporting a pivot If for a magazine designated at M. The magazine is shown in the present instance as supplying two different types of reserve weft, the front and back bobbins B and B, respectively, being spaced and carrying difierent characters of weft. The distance between the centers of the bobbins B and B determines the extent of angular motion of the magazine around the pivot I2, and mechanism not shown herein but set forth in prior patent to Turner No. 2,162,290 may be employed to rock the magazine from one to the other of two predetermined transfer positions. In Fig. 1 the magazine is shown in full lines with the bobbin B located for transfer and in dotted lines with the bobbin B located for transfer.

Pivoted as at it to the bracket II is a transferrer arm l6 having a foot H for engagement with the top of the bobbin in transfer position. A latch holder it is pivoted as at it to a depending part of the transferrer arm and carries a latch 29 having a notch 2i in the rear end thereof for engagement with a hunter 22 carried by the lay L of the loom. The lay has the usual shuttle box 23 and shuttle S to be replenished when the weft supply W is exhausted by operation of a weft detector not shown.

A stand 525 is secured to the loom frame and carries a pivot 2E for a placing lever 2'l the upper end of which may be provided with a shuttle position detector 23. The lower part of lever 21 is provided with a latch lifting finger 30) under the latch. A connector rod 3! is pivoted as at 32 to the placer lever 21 and is provided at its lower end with a yielding rod head 33 comprising two parts 3t and 35 which are held yieldingly together by a tension spring 3'5. Member 34 has a pocket 3i to receive a stud it carried by a lifter lever to which is normally at rest but is given an upward motion preparatory to a transferring operation of the loom to rock the lever Ill in a clockwise direction around pivot 26.

In the operation of the parts thus far described the latch will normally be in the full line down position of Fig. 1 and the lifter finger 3%] will be located below the latch, its position being determined by a stop screw Ml on stand 25. Under these conditions the lay reciprocates normally without causing bunter 22 to engage latch 20, but when the loom is set for a replenishing operation the lifter lever 39 rises and acts through the head 33 and the rod 3| to rock placer lever 21 in a clockwise direction around pivot 26, thereby causing finger 30 to lift latch 20 from the full to the dotted line transfer position shown in Fig. 1. As the lay continues to advance bunter 22 moves latch 28 forwardly, or to the left to depress foot H and effect transfer.

The matter thus far described except as noted hereinafter forms no part of my present invention and may be constructed and operated as set forth in the aforesaid Turner patent.

To illustrate a convenient embodiment of my invention I provide a control lever which is moved by the magazine and also modify the latch for cooperation with a part of the lever. As shown in Figs. 1 and 2 bracket II has a small stand 53 secured thereto and carrying a pivot stud 5i projecting through the hub 52 of a depending lever 53. A torsion spring 54 surrounding the stud 5! has one end held by the stand 53 while the other end engages the front part of the arm 53 as at 55 and urges lever 53 yieldingly toward the lower part of the magazine.

A sheet metal plate 56 is held to lever 53 by screws 57 which pass through slots 58 in the plate to aiford lateral adjustment for the rear wall 59 of the plate relatively to the lever. The lower end of lever 53 is bent forwardly as at 60 to receive a depending rod Bl held in place by a nut 82. The rod 6| may be flattened as at 63 to provide a narrow edge at the lower end thereof. The upper part of the latch 20 is provided with a lug it having front and back vertical edges II and 12, respectively, the distance between which is determined by the amount of angular motion of rod 6|.

The spring 54 holds the wall 59 against the front part of the magazine M as shown in Figs. 1 and 2, thereby cooperating with the magazine as the latter rocks to position rod Hi. When the magazine has been swung fully to one position, such as that shown in full lines to Fig. 1 to place the front reserve bobbin B directly under the transferrer arm El, rod 5| will be in its rearward position behind rear wall 12, and when the magazine is rocked so as to place the rear bobbin B in position for transfer, the lever 53 is swung forwardly and the rod 6| is in front of wall H. The lug 10 on the transfer latch is so placed that it will swing upwardly to a location between the front and back positions of the rod, and when the magazine is properly positioned for transfer lug 10 will clear the rod 6i whether the latter be in front or back position.

Should the magazine fail for any reason to complete its angular motion from one position to the other and be held in some intermediate position, such as shown in Fig. 2, the rod 6| will be located between its extreme positions and will stop ascent of lug H1 and the latch before the latter can reach transfer position. The length of the rod 6! is such that engagement thereof with any part of the lug IE! will hold the notch 2| below the path of the advancing bunter 22. Upon engagement of lug 10 with rod 6| upward motion of rod 3| is arrested and the head members 34 and 35 separate against the action of spring 35 to permit rising of stud 38, thereby avoiding breakage. The resetting of the stud 38 in the pocket 31 forms no part of my present invention and may be accomplished as set forth in the aforesaid patent to Turner.

From the foregoing it will be seen that I have provided simple means for preventing the descent of transferrer arm l6 when the magazine is not properly positioned for transfer. In the form of the invention illustrated this result is accomplished by a preventer rod positioned by the magazine for engagement with a part of the transfer latch to prevent the latter from moving into the path of the bunter 22 when the magazine is in an intermediate position, such as shown in Fig. 2. It is to be understood that the rocking of the magazine from the full to the dotted line position illustrated in Fig. 1 under influence of the box motion or some other part which is coordinated with the shifting of the active weaving shuttles at the opposite end of the loom is normally completed before the lifter lever 39 starts to rise. It will further be seen that when the preventer rod 6| arrests upward motion of the latch 20 the giveway head 33 yields to prevent breakage. It will also be seen that the magazine is capable of assuming two transfer positions in each of which the lug 70 can clear the preventer rod BI and that an improper positioning of the magazine which places rod 5| at any point between its extreme front and back positions will prevent transfer. While I have shown one particular means for preventing descent of the transfer arm when the magazine is misplaced I do not wish necessarily to be limited to the precise structure shown herein.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a rocking magazine which swings to either of two predetermined positions to place one or the other of two different reserve weft supplies in position for transfer and having a latch movable from normal to transfer position preparatory to a transferring operation of the loom, that improvement which comprises a lever to engage the magazine and controlled thereby to assume two extreme positions corresponding to the predetermined positions of the magazine, a fixed pivot for the lever in the path of the stop shelf when the magazine is in an intermediate position between said predetermined positions to engage the stop shelf and prevent the transferrer latch from moving to transfer position.

2. In a weft replenishing loom having a rocking magazine which swings to either of two predetermined positions to place one or the other of two different reserve weft supplies in position for transfer and having a latch movable from normal to transfer position preparatory to a transferring operation of the loom, that improvement which comprises a latch stop lever engaging the magazine and controlled thereby to assume two extreme positions corresponding to said predetermined positicns of the magazine, and means on the latch to be disposed between the two ex treme positions of said lever and to be in alignment with said lever when the latter is between the extreme positions thereof to prevent movement of the latch to transfer position.

3. In a weft replenishing loom having a rocking magazine which swings to either of two predetermined positions to place one or the other of two different reserve Weft supplies in position for transfer and having a latch movable from normal to transfer position preparatory to a transferring operation of the loom, that improvement which comprises a stop element to be positioned by the magazine to either of two extreme positions corresponding to the predetermined positions of the magazine and controlled by the magazine to assume a position between said extreme positions when the magazine is intermediate said predetermined positions, and a stop shelf on said latch movable along a path between the extreme positions of said stop element when the latch moves to transfer position and positioned to be engaged by said element when the latter is between the extreme positions thereof to prevent movement of the latch to transfer position when the magazine is between said predetermined positions.

4. In a multicolor weft replenishing loom having a rocking magazine which swings to either of two predetermined positions to place one or the other of two different reserve weft supplies in transfer position and having a transfer latch movable from normal to transfer position by a yielding means when a transferring operation of the loom is to occur, that improvement which comprises a stop element controlled by the magazine and positioned by the latter to occupy either of two extreme positions corresponding to the two predetermined positions of the magazine,

and a stop member on the latch movable with the latter when said latch moves from normal to transfer position along a path which extends between said extreme positions, said member to be engaged by the stop element when the latter is between the extreme positions thereof to prevent the latch from being moved by the yielding means to transfer position when the magazine is between the aforesaid predetermined positions thereof.

5. In a weft replenishing loom having a rocking magazine which swings to either of two predetermined positions to place one or the other of two different reserve weft supplies in position for transfer and having a latch movable from normal to transfer position preparatory to a transferring operation of the loom, that improvement which comprises stop means controlled by the magazine and movable by the latter from one extreme position to another extreme position, said extreme positions corresponding to the predetermined positions of the magazine, and an element on the latch movable along a fixed path when the latch moves from normal to transferring position, said stop means being on one side of said path when the magazine is in one predetermined position thereof and being on the other side of said path when the magazine is in the other of said predetermined positions, and said stop means lying in the path when the magazine is between said predetermined positions to engage the element and prevent the latch from moving to transfer position.

ALBERT CEDERLUND. 

